This movie shares a lot of DNA with films like “Earth Girls are Easy” and “Coneheads,” comedies from the eighties that embrace silliness. A scientist who’s recently lost his wife (played by Dan Aykroyd) makes first contact, which leads to an alien agent—Kim Basinger—being dispatched to see him. She carries a counselor shaped like a snake with one eye, and somehow ends up marrying the physicist, even though this co…